Ore crusher



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3 Sheets-Sheet 2.

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S. R. KROM ORE GRUSHBR.- y

No. 340,720. Patented Apr. 27, 1886.

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3 Sheets-Sheet 3. S. R. KROM.

(No Model.)

ORE GRUSHER.

No. 340,720. PatentedApr. 27, 1886.

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UNITED STATES PATENT GEEICE.

STEPHEN R. KROM, OF PLAINFIELD, NEW JERSEY.

ORE-CRUSH ER.

SPECIPCATON forming part of Letters Patent No. 340,720, dated April 2'7,1886.

Application filed May 1S, 1885. Serial No. 165,794. (No model.)

To all whom it may concern:

Beit known that I, STEPHEN R. KROM, of Plainfield, in the county ofUnion and State New Jersey,have invented an' Improvement inOre-Crushers, of which the following is a specification.

In this crusher there are two rollers, one of which is supported inswinging pillow-blocks. The other roller is supported in eitherstationary or swinging pillowblocks, both above the bed-plate. Closeunderneath the bearings in the pillow'blocks holes are cast to receivethe tie-bolts. These tie-bolts are to hold the pillow-blocks in properrelation to each other. Both pairsof the pillow-blocks may be made toswing, and in this form may be preferable, for lessening the cost of themachine.

The great advantagein having the bearings of atleast one roller swingfor adjusting the roller and for compensating for wear of thecrushingfaces, instead of employing sliding pillowblocks on the castiron bed-plates, is that where the pillow-blocksslide any looseness onthe bed of the movable bearings causes injury to the top surface of thebed-plate and bottom surface of the pillow-blocks from particles of sandor ore which may get between the two surfaces as the parts move orvibrate during the crushing of the ore. Besides this, heretofore the twomovable bearings had to be drawn up separately, and it required care tokeep the rollers and shafts parallel with each other. In this machinethe two swinging pillow-blocks are united by a strong shaft, and bothmove together.

In the drawings, Figure l is a plan view of the machine, partly insection. Fig. 2 is an elevation with the housing and shafts of therollers in section near the journal-boxes. Fig. 3 is an end view of theswinging pillow-block. Fig. 4 is a side view of the same. Fig. 5is anend view of one of the rollers, showing the split tapering head. Fig. 6is an end view of the tapering head, which is shrunk upon the shaftofthe roller; and Fig. 7 represents both rolls supported in swingingbearings.

The rolls A and B are alike, each roll being composed of a steel band ortire, a, the inner surfaces of which are tapering. These tires aresupported upon heads C D, with corresponding tapers. One of thesecone-shaped heads on each shaft is split on one side, but

the other `is not split, but is shrunk ou, or otherwise securely fixedon the shaft. The bolts d, passing through holes in the heads C D, areused to draw the heads together, and consequently the tires are firmlyheld,and the action of drawing the split heads D within the tires causesthe split heads to close tightly on the shafts. Heretofore both heads CD were split; but I have discovered that it is a great advair tage tohave one head rigidly fixed to the shaft without the possibility ofbecoming misplaced, and this serves as a permanent guide for placing thetires in their proper position on the shaft.

G is the main shaft of the roll A, and to this the drivingfpower isapplied by the pulley H.

K is the shaft of the roll B, and upon this is a pulley, L, to whichpower is applied to revolve the said roll B, for producing the bite onthe ore.

The shaft G is in pillow-blocks E, Figs. 1 and 2, which are representedas bolted rigidly upon the bed-plate E. The journal-bearings in thepillowblocks are placed at an inclina tion, so that the weight of therolls themselves, and the pressure-on the bearings due to crushing theore, are taken on the portion of the bearings formed with thepi1low-blocks, 4and no strain comes on the caps or cap-bolts. The shaftK of the roll B is received into j ournal-boxes lc of the swingingpillow-blocks M, and the swinging pillow-blocks are supported on thepivot-shaft N, the ends of which are received into holes in bossesprojecting from the bed-plate at each side.

The swinging pillow-blocks can be made as separate pieces; but forreasons before set forth it is preferable to unite the two with thestout shaft m. Holes at o are cast into the swinging pillowblocks, justbelow the bearings, into which the ends of the bolts O are pivoted bymeans of orosspins o. The tiebolts O pass also through holes in thestationary pillow-blocks E, and the nuts on the tiebolts O are employedfor holding the two rollers in proper relation to each other and to drawthem together to compensate for wear.

It willrbe apparent that in consequence of the portion E being lowerthan the main portion of the bed E the caps of the swingingpillow-blocks M can be easily removed or re-' placed, and the top of theportion F of the bed is depressed, as indicated by dotted lines in Fig.2, so that the necessary space is given for introducing the swingingbearings between the side portions of the bed-plate through which theshaft N passes. The bed-plate is strengthened by the cross-plates F2 F3,(shown by dotted lines, Fig. 2,) and between these the crushed ore isallowed to fall away into a suitable receptacle.

I make use of a curved apron, R, introduced beneath the roller B andextending backwardly and upwardly from the cross-plate F2, so as to forma chute, and at the same time a cover for the connecting-shaftm of theswinging pillow-blocks M, and this apron catches any pieces of crushedore that may drop from the roll B and directs the same to thedischarge-opening between the plates F" and F3.

The housings S S for inclosing the rollers, for retaining the dustproduced from crushing the ore, and for forming supports for the hopper,are made of iron, except their upper portions, T, which are made of woodfor greater convenience of removal. rIhe housings rest upon and arebolted to the bed-plate.

' The ore to be crushed is allowed to flow down the incline chutes u uand between the rollers7 and to prevent the ore from running off at theends of the rolls I have provided cheek-pieces V, generally the same asthose described and shown in my application tiled August 4, 1884, SerialN o. 139,564, to fit quite close to each end of the rolls. Thesecheek-pieces are held in stocks, and are removable in order to insertnew cheek-pieces, as may be required. The stocks which hold the cheekpieces-are adjustable sidewise, to compensate for wear of the rollers.These stocks are supported by the housing-plates, which are braced andadapted to hold the stocks for the cl1eelc-pieces,and also to supportthe hopper U.

In Fig. 7 I have represented the swinging bearings as duplicated, sothat both rollers are supported by such swinging bearings. It is to beunderstood that the foregoing description ofthe swinging bearings forone roll applies to the swinging bearings of the other roll, and theonly difference is that the holes iu one set of swinging bearings forthe tiebolts O should be round, and tubes or sleeves applied around thebolts between the swinging bearings and the nuts l?. This takes theplace ofthe pivot-bolts o and allows the nuts to be set up the same asin Fig. 2. the heads of the bolts may be made as segments of acylinderin place of using the pivotpins o'. It will now be understood that asthe surfaces of the rolls A B wear away the nuts P can be screwed up,after the stop-screws Q between the frame and swinging pillow-blockshave been turned back, and the movable bearings will swing forward ontheir axis N. The pins o', which hold the tie-bolts D to the swingingpillow-blocks, are so placed that the tiebolts are but slightly thrownfrom a horizontal position as the parts swing. The tie-bolts are Ifdesired,

also placed as close to the bearings as possible, so that the strain dueto crushing the ore is almost directly received on the tie-bolts and aslittle as possible thrown on the bed-plate.

I herein distinctly disclaim connections from xed standards to movingpillow-blocks when placed above the roll-bearings in rollergrinding-mills, as they have been used, but they o being beneath andclose to the shaft K of the roller B, substantially as specified.

2. vThe combination, with two crushing-rollers and their shafts andbearings, of swinging pillow-blocks having a pivot-shaft at their lowe'rends and a rigid connection extending across from one pillow-block tothe other at the lower ends, a bed-plate beneath such rollers, receivingthe pivot-shaft of the swinging pillow blocks, and adjustable tieboltsbetween thepillow-blocks of one roller and the pillow-blocks of theother roller, substantially as specified.

3. The combination, with the crushing-rollers, their shafts andbearings, of swinging pillow-blocks, a pivot-shaft at the lower ends ofsuch pillow-blocks, a bed-plate below the swinging pillow-blocks and towhich they are pivoted, and tie-bolts and adjusting-nuts be'- low theshafts of the rollers and connecting the pillow-blocks of one roller andthe pillowblocks of the other roller, substantially as specified.

4. The combination, with the crushing-rolls A B, their shafts andbearings, of swinging pillow-blocks, bed-plates, a pivot-shaft betweenthe bed-plate and the lower ends of the swinging pillow-blocks, and aninclined apron, B, below the roller B and between the swingingpillow-blocks, substantially as specilied.

5. The combination, with the crushing-roller shafts and tires, of onehub fixed permanently on each shaft, and one split hub on each shaft,and bolts or nuts to draw or force the split hubs toward the stationaryhubs, so that the tires will be firmly fixed and held in place and thesplit hubs will close tightly on the shafts, for the purpose andsubstantially as set forth.

6. The combination, with the crushing-rollers, their shafts andbearings, of the swinging pillow-blocks M M, the tubular connection mbetween the same `at their lower ends, the bedplate with the projectionsbetween which the swinging pillow-blocks are received, and the IIOpivot-shaft; passing through the bed-plate and blocks, andthescrew-stops Q, for the swinging pillow-blocks, substantially asspecified. pillow-blocks, substantially as specified. [o 7. Thecombination, in an ore-crushing ina- Signed by me this 13th day of May,A. D. chine, of two rollers, their shafts and bearings, 1885. 5 swingingpillow-blocks, a bed-plate, e pivot- S. R. KROM.

shaft connecting the lower ends of the swing- Witnesses: ingpillow-blocks to the bed-plate', the tie- GEO. T. PINOKNEY, boltsbetween the respective pairs of pillow- WILLIAM G. MOTT.

